Hi again Marilee
I dont have much information to hand at the moment but there was a studio called Glasshouse, in Covent Garden I believe, but definately in London. Not sure of this but seem to recall it was started by Sam Herman and I have a vase with the glasshouse mark made by Pauline Solven. This was started in the late 1960's but unfortunately do not remember if it closed or if it is still operating....not sure.... I'll have a look around and see what I can find.